An unseen of video of former prime minister Nawaz Sharif bidding farewell to his wife Begum Kulsoom Nawaz for the last time has gone viral on social media soon after the death of Pakistan's former first lady in London Tuesday.

In the video, a visibly emotional Sharif can be seen talking to his unconscious wife in a London hospital before his return to Pakistan on July 12 to serve his 11-year jail term.

Ahead of his departure from London, Sharif had said his wife finally opened her eyes for a few seconds -- something he had revealed a day prior that he wished for.

He, however, regretted having to leave her in such state to return to the country.

At that time, he had said that he was leaving behind his ailing wife in Allah's protection and returning to Pakistan regardless of whether he was "taken to prison or gallows".

Kulsoom died on Tuesday in London after a protracted battle with throat cancer.

Sharif, his daughter Maryam and son-in-law Captain (retd) Muhammad Safdar are currently serving jail terms in Adiala Jail in Rawalpindi after being convicted by an accountability court in a corruption case in July.